IceCube-201221A: Upper limits from Insight-HXMT/HE observations
Abstract
Insight-HXMT was taking data normally around the trigger time (T0=2020-12-21T12:36:53.00 UTC) of this high-energy neutrino event (GCN #29102), which was monitored by Insight-HXMT without any occultation by the Earth. There is no significant excess event (SNR > 3 sigma) found in the search of the Insight-HXMT/HE raw light curve (within T0 +/- 100 s). Assuming the counterpart GRB with three typical GRB Band spectral models, two typical duration timescales(1 s, 10 s) coming from the position of this neutrino event, the 5-sigma upper-limits fluence (0.2 - 5 MeV, incident energy) are reported below: Band model 1 (alpha=-1.9, beta=-3.7, Ep=70 keV): 1s: 3.9e-08 erg cm^-2 10s: 2.4-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1s: 6.8e-08 erg cm^-2 10s: 3.6e-07 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1s: 2.0e-07 erg cm^-2 10s: 1.1e-06 erg cm^-2 Further analysis will be reported in the following circulars. All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org.
- Publication:
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GRB Coordinates Network
- Pub Date:
- December 2020
- Bibcode:
- 2020GCN.29146....1C